Adds "overdue" annotation field to POLineItem serializer

InvenTree/order/api.py

@@ -274,7 +274,7 @@ class POLineItemFilter(rest_filters.FilterSet):
         model = models.PurchaseOrderLineItem
         fields = [
             'order',
-            'part'
+            'part',
         ]
 
     pending = rest_filters.BooleanFilter(label='pending', method='filter_pending')
@@ -391,6 +391,7 @@ class POLineItemList(generics.ListCreateAPIView):
         'reference',
         'SKU',
         'total_price',
+        'target_date',
     ]
 
     search_fields = [
@@ -401,11 +402,6 @@ class POLineItemList(generics.ListCreateAPIView):
         'reference',
     ]
 
-    filter_fields = [
-        'order',
-        'part'
-    ]
-
 
 class POLineItemDetail(generics.RetrieveUpdateDestroyAPIView):
     """
@@ -703,6 +699,7 @@ class SOLineItemList(generics.ListCreateAPIView):
         'part__name',
         'quantity',
         'reference',
+        'target_date',
     ]
 
     search_fields = [

InvenTree/order/models.py

@@ -799,6 +799,14 @@ class OrderLineItem(models.Model):
         target_date: An (optional) date for expected shipment of this line item.
     """
 
+    """
+    Query filter for determining if an individual line item is "overdue":
+    - Amount received is less than the required quantity
+    - Target date is not None
+    - Target date is in the past
+    """
+    OVERDUE_FILTER = Q(received__lt=F('quantity')) & ~Q(target_date=None) & Q(target_date__lt=datetime.now().date())
+
     class Meta:
         abstract = True
 

InvenTree/order/serializers.py

@@ -5,12 +5,14 @@ JSON serializers for the Order API
 # -*- coding: utf-8 -*-
 from __future__ import unicode_literals
 
+from datetime import datetime
+
 from django.utils.translation import ugettext_lazy as _
 
 from django.core.exceptions import ValidationError as DjangoValidationError
 from django.db import models, transaction
 from django.db.models import Case, When, Value
-from django.db.models import BooleanField, ExpressionWrapper, F
+from django.db.models import BooleanField, ExpressionWrapper, F, Q
 
 from rest_framework import serializers
 from rest_framework.serializers import ValidationError
@@ -26,7 +28,7 @@ from InvenTree.serializers import InvenTreeModelSerializer
 from InvenTree.serializers import InvenTreeDecimalField
 from InvenTree.serializers import InvenTreeMoneySerializer
 from InvenTree.serializers import ReferenceIndexingSerializerMixin
-from InvenTree.status_codes import StockStatus
+from InvenTree.status_codes import StockStatus, PurchaseOrderStatus, SalesOrderStatus
 
 import order.models
 
@@ -126,6 +128,7 @@ class POLineItemSerializer(InvenTreeModelSerializer):
         Add some extra annotations to this queryset:
 
         - Total price = purchase_price * quantity
+        - "Overdue" status (boolean field)
         """
 
         queryset = queryset.annotate(
@@ -135,6 +138,16 @@ class POLineItemSerializer(InvenTreeModelSerializer):
             )
         )
 
+        # Add an annotated 'overdue' field
+        queryset = queryset.annotate(
+            overdue=Case(
+                When(Q(order__status__in=PurchaseOrderStatus.OPEN) & order.models.OrderLineItem.OVERDUE_FILTER,
+                    then=Value(True, output_field=BooleanField()),
+                ),
+                default=Value(False, output_field=BooleanField()),
+            )
+        )
+
         return queryset
 
     def __init__(self, *args, **kwargs):
@@ -155,6 +168,8 @@ class POLineItemSerializer(InvenTreeModelSerializer):
     quantity = serializers.FloatField(default=1)
     received = serializers.FloatField(default=0)
 
+    overdue = serializers.BooleanField()
+
     total_price = serializers.FloatField(read_only=True)
 
     part_detail = PartBriefSerializer(source='get_base_part', many=False, read_only=True)
@@ -185,6 +200,7 @@ class POLineItemSerializer(InvenTreeModelSerializer):
             'notes',
             'order',
             'order_detail',
+            'overdue',
             'part',
             'part_detail',
             'supplier_part_detail',